Exhausted from the night before, Wanda finishes the glass of raw eggs, trying to ease the throbbing headache. Blinking blearily, Wanda stretches back and lets out a quiet yawn... Quiet to her, at least.
Peter scrambles as the lip beneath him tilts and stretches, the creases and ridges of the pillowy lip disappearing, the handholds becoming near and few as Wanda's mouth opens for a long yawn. Peter could feel his grip slipping, the wind silently rushing through his hair as the air is sucked deep past him, a simple breath for the Scarlett Witch, a death trap for the Spidey!
As Wanda exhales, the normally quiet yawn is magnified to Peter's tiny ears, the raw sound shaking him as wind rushes beneath him, his hold on her lip growing weaker. However, just as soon as it began, it ended, the lips crinkling as the lips close together again. With the shifting conditions in his favor, Peter relaxes as he assumes he's safe.
He was not.
Most people breathe in, and out, and in again. Peter, in his desperation, forgot this, rather paying attention to the hand covering the yawn. Peter thought this might be a good chance to leave the dangerous cliff of Wanda's face, and prematurely readied himself to jump.
As soon as the yawn ended, Wanda instinctively needed to breathe. Not wanting to seem like a Neanderthal, she decided to inhale through her nose... just as Peter's grip relaxed.
Peter's Spidey senses tingle, just as he is lifted into the sky, drawn into the dark caverns of Wanda's nostril. Reacting quickly, Peter attempts to web anything to prevent him from getting sucked deeper into Wanda.